Hi there, It looks like thread aware debugging is broken on FreeRTOS 10.2.1 (not sure if other versions are affected). I'm using Jlink v6.56b (latest). Relevant error is: Received symbol: pxCurrentTCB (0x00000000) ERROR: Mandatory symbol pxCurrentTCB not found. pxCurrentTCB is defined and I can set a watch on it. Thanks!